Ceiling fan



FIG. 1 is a front-left-bottom perspective view of a ceiling fan, showing my new design;

FIG. 2 is a front elevational view thereof, on a reduced scale;

FIG. 3 is a rear elevational view thereof, on a reduced scale;

FIG. 4 is a left side elevational view thereof, on a reduced scale;

FIG. 5 is a right side elevational view thereof, on a reduced scale;

FIG. 6 is a top plan view thereof, on a reduced scale; and,

FIG. 7 is a bottom plan view thereof, on a reduced scale. 

The ornamental design for a ceiling fan, as shown. 